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Author Topic: HELP!!!  (Read 2261 times)

Offline wassup

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HELP!!!
« on: October 27, 2009, 03:13:20 pm »
The question is shade AUB'. Why is the pointed part shaded? (See below)
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Offline @d!_†oX!©

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Re: HELP!!!
« Reply #1 on: October 27, 2009, 03:14:58 pm »
dude cuz di is A union B'
if it was A intersection B' then we wouldn't shade that part!!
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nid404

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Re: HELP!!!
« Reply #2 on: October 27, 2009, 03:17:04 pm »
yaa that's right

B'  is everything not in B...which includes A and the rest of the universal set. and it is union A and A consists of the shaded oart also
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Offline wassup

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Re: HELP!!!
« Reply #3 on: October 27, 2009, 03:20:31 pm »
thanks fr d help.
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Offline Ash16

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Re: HELP!!!
« Reply #4 on: October 27, 2009, 03:21:14 pm »
Hey i got that, but can u explain why we wouldn't shade that part if it was A intersection B' ???  :-[
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nid404

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Re: HELP!!!
« Reply #5 on: October 27, 2009, 03:24:08 pm »
intersection would mean common between A and B'
So u would only shade A without the intersection or the rest of the universal set
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nid404

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Re: HELP!!!
« Reply #6 on: October 27, 2009, 03:24:54 pm »
The set of only A is common between A and B'

Hope u understood

tell me if u need a diagram
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Offline Ash16

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Re: HELP!!!
« Reply #7 on: October 27, 2009, 03:25:38 pm »
Yah!  :D Thankyou!
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nid404

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Re: HELP!!!
« Reply #8 on: October 27, 2009, 03:26:54 pm »
Quote from: Ash16 on October 27, 2009, 03:25:38 pm
Yah!  :D Thankyou!

you need a diagram or u understood??
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Offline Ash16

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Re: HELP!!!
« Reply #9 on: October 27, 2009, 03:28:11 pm »
A diagram could help for clarity.. Thanks!!!
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Offline holychalice

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Re: HELP!!!
« Reply #10 on: October 27, 2009, 03:30:47 pm »
See .. intersection is d part both d sets share ... if its compliment of B ...
it wud share only A widout intersection of A nd B ... because this intersection dusnt cum in B' ....
is this rite ?
 
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Offline Ash16

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Re: HELP!!!
« Reply #11 on: October 27, 2009, 03:33:18 pm »
Yeah that makes it clear!! thanks manbir :D
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nid404

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Re: HELP!!!
« Reply #12 on: October 27, 2009, 03:36:13 pm »
Quote from: Ash16 on October 27, 2009, 03:28:11 pm
A diagram could help for clarity.. Thanks!!!

cool

Diagram one shows set of A
Diagram two shows set of B'

Diagram three is intersection of the two....what is common in the two diagrams?? Only set of A
« Last Edit: October 27, 2009, 03:41:10 pm by nid404 »
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Offline holychalice

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Re: HELP!!!
« Reply #13 on: October 27, 2009, 03:39:13 pm »
Yea .. its like putting 2 diagrams on top of each other nd den d part which is double shaded ( or as nid said common ) is ur answer
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nid404

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Re: HELP!!!
« Reply #14 on: October 27, 2009, 03:40:37 pm »
sorry i posted them on the wrong thread :P....check https://studentforums.biz/index.php/topic,4523.0.html
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